Although understudied in emerging markets, in modern globalised economies, family business internationalization is becoming an increasingly more relevant topic. Consequently, our research focuses on investigating the listed family firms in Chinese Mainland in order to fill the research gap. Specifically, we studied the influence of family involvement in ownership and management of companies on their degree of internationalization. Existing theories on internationalization mainly focused on economic aspects, while we adopt the perspective of socio-emotional wealth (SEW) which refers to non economic aspects to investigate this subject. We take listed family firms in Chinese Mainland as our sample. The results show that family involvement in ownership is positively associated with the degree of internationalization and family involvement in management has no certain relation with the degree of internationalization. This is a different finding in this area since previous researches have not taken Chinese listed family firms as samples before. Future research can improve the SEW theory by testing wider samples.